News from La Fournaise, Semeru, Sakurajima and Fuji San.

The eruption of Piton de La Fournaise, which began on 09/19/2022 around 07:48 local time, continues. The amplitude of the eruptive tremor (indicator of surface lava emission) has been increasing since 9:40 p.m. local time on September 29, 2022 (5:40 p.m. UTC). This intensification is most certainly linked to an increase in pressure within the eruptive cone which led to the widening of the opening of the main mouth yesterday. The activity at the level of the secondary mouth (south of the main cone) mentioned in yesterday's press release has greatly decreased.

Three volcano-tectonic earthquakes have been recorded directly above the summit area over the past 24 hours.

The resumption of slight inflation (swelling) over the entire volcano (summit and enclosure) is confirmed but remains of very low intensity for the moment (< 1 cm).

Images from the OVPF-IPGP webcam located at Piton de Bert show that the greater lava projection activity observed yesterday at the eruptive site is continuing. On the other hand, the secondary eruptive mouth mentioned in the previous press release, gradually ceased its activity during the day yesterday.

Degassing is still observed at the eruptive site.

The majority of lava flows are still through lava tunnels within which many resurgences are visible;

Lava flows also occur directly from the secondary mouth.

The lava flow estimates established by satellite method on the HOTVOLC (OPGC - Clermont Auvergne University) and MIROVA (University of Turin) platforms indicate an average flow over the last 24 hours relatively stable around 4-6 m³/s with a peak recorded at 16 m³/s today late morning. These measurements show since September 28, a gradual increase in the estimated flow. As lava flow activity now takes place primarily in tunnels, these estimates are minimum values.

It should be noted that significant peaks in SO2 air pollution were reached at the Bourg-Murat station, with hourly values ​​that exceeded 330 ug/m³.

Alert level: Alert 2-1 (Access to the Enclosure prohibited; eruption in the Enclosure without any particular threat to the safety of persons, property or the environment)

Source: OVPF

Find all the information relating to the activity of Piton de la Fournaise on the various OVPF-IPGP media: - the website: ipgp.fr/fr/ovpf/actualites-ovpf - the Twitter account: twitter. com/obsfournaise - the Facebook account: facebook.com/ObsVolcanoPitonFournaise

The eruption of Semeru continues.

A white plume was observed at the main crater on October 1, with moderate to high intensity about 200 meters from the summit.

The seismicity of 01,10,2022 is characterized by:

- 65 eruption earthquakes with an amplitude of 10-22 mm and an earthquake duration of 55-130 seconds.
- 7 emission / blast earthquakes, with an amplitude of 1 to 8 mm and the duration of the earthquake was 35 to 85 seconds.
- An episode of harmonic tremor, with an amplitude of 6 mm, and an earthquake duration of 100 seconds.
- 1 deep volcanic earthquake, with an amplitude of 24 mm, S-P 1.5 seconds and an earthquake duration of 15 seconds.
- A local tectonic earthquake, with an amplitude of 18 mm, S-P 9 seconds and an earthquake duration of 40 seconds.
- And 3 distant tectonic earthquakes.

The activity level is at III (Siaga), with the recommendation not to
carry out no activity in the southeastern sector along Besuk Kobokan, up to 13 km from the summit (the center of the eruption). Outside of this distance, the community does not conduct activities within 500 meters of the bank (river edge) along Besuk Kobokan due to the potential for expansion from hot clouds and lava flows. at a distance of 17 km from the summit.
and not to move within 5 km of the crater / summit of Mount Semeru because it is subject to the danger of stone throwing (incandescent).

Source: Magma Indonesia, PVMBG

At Sakurajima, the activity continues, with in 1st report this October 2, 2022 at 1:34 p.m. local time, a white eruptive plume at 1,300 m. above the Minamidake crater.

The displacement of the plume is towards the west.

Source: JMA

As a bonus, the first snows on Mount Fuji... at your discretion.